White Rodgers 241-2, 1609 Wiring, Setting The Dial, Controls with one circuit two terminals

WIRING

All wiring must conform to local and national electrical codes and ordinances.

Connect in accordance with wiring diagrams provided by the equipment manufacturer. If none are provided, the following represents a typical installation.

Controls with one circuit (two terminals)

Low

temperature

limit

Temperature	High side
	pressure control
control
	(if used)
L1	To
Line
	Compressor
L2 Note: Make L1 “HOT” on	Motor
120V installation

Circuit showing temperature control con- trolling compressor directly.

Note: Make L1 “HOT” on

L1	120V installation
Line	Low temperature	Temperature
	limit		control
L2
	High side	Suction	Solenoid
	pressure	pressure
			refrigerant
	control	control
			valve

Motor starter

To

Compressor

Motor

Circuit showing temperature control to open and close refrigerant valve. Suction pressure control starts and stops compressor through motor starter.

Controls with two circuits (three terminals)

BLUE RED

WHITE

The blue terminal is common. The table below shows the maximum load allowed between terminals.

	MAXIMUM ALLOWABLE RATING
LOAD CONDITIONS	Full Load		Locked Rotor
	120V	240V	120V	240V
Load between Blue and Red	7.4A	3.7A	44.5A	22.2A
terminals must not exceed:
Load between Blue and White	7.4A	3.7A	44.5A	22.2A
terminals must not exceed:

This diagram shows a typical two-circuit applica- tion. Several zones receive refrigeration from the same compressor, but each zone requires its own solenoid refrigerant valve and temperature control.

Note: Make L1 “HOT” on	B	R
120V installation
		W
L1
Line
L2
To
Compressor
Motor

BR W

Valve

No. 1

To

Additional

Units

Valve

No. 2

SETTING THE DIAL

The movable indicator (D) points to the temperature at which the compressor starts. The fixed indicator (B) points to the tempera- ture at which the compressor will stop. The difference between these two indicators is the differential. Follow these instructions to set the dial:

1.Insert a screwdriver in the adjusting slot (A) and turn the dial until the fixed indicator (B) points to the temperature at which the compressor is to stop.

2.Turn the differential adjusting screw (C) until the movable indicator (D) points to the temperature at which the com- pressor is to start.

“B” Fixed indicator (cut-out point)

“C” Differential adjusting screw

“D” Movable indicator

(cut-in point)

“A” Adjusting slot

2